The Latest on the trial of two former Albuquerque police officers(all times local):

12:35 p.m.

An expert witness says two Albuquerque officers violated their own training when they fatally shot an armed homeless man during a 2014 standoff.

The testimony from police expert Jeffrey Noble came Tuesday in the trial of two former officers who face second-degree murder charges in the death of James Boyd.

Noble was called to the stand by special prosecutor Randi McGinn. She argues that police created a dangerous situation during the standoff that led to the deadly outcome.

Noble says officers had a layered plan to use less-lethal force to get Boyd to surrender.

When the plan failed, Noble says, officers could have stopped to reassess the situation and create distance between themselves and Boyd, but didn't.

Noble says Boyd had his knives out but posed no immediate threat when he was shot.

Defense attorneys have argued that Boyd, who was mentally ill and had history of violence against law enforcement, was a threat.


2:35 a.m.

The chaotic, final seconds of the Albuquerque Police Department's deadly standoff with a homeless man unfolded as a K-9 handler and police service dog came within feet of the man and his pocket knives.

A defense attorney says two officers made the "split-second" decision to shoot him.

A frame-by-frame breakdown of police helmet video from the March 2014 shooting was shown to jurors Monday on the first day of the trial of now-retired Detective Keith Sandy and former Officer Dominique Perez.

Both are charged with second-degree murder in the death of James Boyd, who was diagnosed with schizophrenia and told officers he was on a special mission for the U.S. Defense Department.

During opening statements, the prosecutor and lawyers for the former officers presented two vastly different portraits of Boyd and two versions of the chain of events that led to his death.